Arbor or mandrel for slotting or splining machines.



' PATENTED AUG.7,1906.

- G. A. OWEN. ARBOR 0R MANDREL POR SLOTTING 0R SPLINING MACHINES.

APPLICATIONTILED SEPT. 23. 1905.

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UNITED STATES: PATENT oFFIoE.

' GEORGE ALFRED owEn'oF SPRINGFIELD, MASSACHUSETTS. i' ARBoR R MANDREL FOR sLoIIlNG 0R sPLlNmG MACHINES.

Specification of Letters Patent.

Patented Aug. 7, 190e.

Application filed September 23, 1905'. Serial No.y 279.791.

To all whom t may concern:

. IOv

Beit known` that I, GEORGE ALFRED OWEN, a citizen of the United States of America, and a resident of Springeld, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Arbore or Mandrels for Slotting or Splining Machines, of which the following is a full, clear, and exact description.

This invention relates to the tool or cutter carryingpart or parts of slotting, splining, grooving, and analogous machines, commonly termed arbors or mandrels, and the improvements particularly relate Lto struction of the arbor for the receptionand temporary retention therein of the bar which carries' the' tool or cutter and to the construction of the means comprised in the arbor for acquiring periodically and gradually more prominent successive' positionings of the tool for its repeated cutting passes.

' They invention also relates to means for maintaining the tool most iirmly and rigidly in its position in the arbor and means pertaining to the tool-bar whereby heads or cutters thereof may be interchangeable or substituted. y

AnotherV object is to provide an adjustable stop for the cam-rod which controls the positioning of the cutter whereby such rod can` have only a certainpredetermined endwise motion in the arbor and whereby, consequently, the cutter will never beset out beyond the vgiven predetermined extent, thusy precluding any danger of the making of a too deep cut by inadvertence or oversight of the operation of the machine in which-this arbor is included.

To' these ends theinvention consists i-n the lparts havingcertain particular formations and the combinations of parts, all substantially as hereinafter fully described, and set forth in the claims.

"The improved arbor is illustrated in the accompanying drawings, in which- Flgure 1 is a longitudinal section with certain parts shown in side view. Fig'. 2 is' a plan-view of one of the tool or cutter bars. Fig. 1a is a view of theleft-hand end of the arbor; Fig. 3 is a plan View of the tool-receiver or body of the arbor. Fi 4 is a longitudinal section of the receiver, t e parts to be held therein having been removed. Figs. 5, 6, 7, and 8 are perspective views showing particular constructions of the tools.

The same or similar parts are denoted by the con'- corresponding reference characters in all of the views.

The cutting-arbor comprises a b'o'dy or receiver portion 5, made, preferably, of round bar-steel, and the tool-carrying part is usually made in a section to be joined endwise toan elongated part at its right-hand end 4. The particular description of Ina-chine in-which1 one or several of these improved arbors may be employed is found in an a plication for Letters Patent of the United tates filed by me November 16, 1904, Serial No'. 232,979, and wherein, moreover, explanation is to be found of the means for successively and vintermittently rotationally moving the sleeve 25V for positioning the tool-bar for its new cuts on rapid passes. It is evident, however,th'at after the externally-threaded sleeve has been moved inwardly relatively to Athe body or receiver to such an extent as to bring the part 31 against the end of the receiver there may be no further outset ofthe tool for thev making of a groove-like cut in the work deeper than prescribed'.

The cutting-arbor F as a Whole comprises a receiver portion 5, made, preferably, of. round bar-steel. A mortise-like cut o'r trough-shapedrecessV 7 is provided about midway kof receiver 5, into which; snugly iits the shank of a cutting-tool 8, and at one end of this cut 7 is a slightly-widened continuation 9, in which' the cutting-head 10y of said tool 8' closely iits, the cutting-point 11 roj ecting above the surface of receiver 5'. ln a further continuation of the cutis a narrow cut 12 ,fthe end of which is inclined or undercut, as shown in Figs'. 2 and 4 at 12'a,`and a narrow extension 13" of cutter-head 10, which iits intoy and is guided by this cut 12, has its end inclined or beveled to correspond with the inclined portion of the cut 12 described. The other end portion of the shank of the cutting-tool 8 hasa deep notch 14, the sidesk of which are parallelv and iit closely to' a guidepin 15. (Shown in sectionin Fig. l.) Projecting into this notch 14 from a socket 16 in the tool Slis a spring-plunger 17, which bears against the guide-pinl 15,' thus keeping the tool 8 pressed against the beveled end 12a of cut 12, which pressure tends to keep the cutting-head 10 down to the bottom of its mortise 9, and to'insure a more positive actiony a second and much stronger spring-plunger 16a is provided in a hole 17 a in the solid end of receiver 5 and is adapted to press against the end '18 of the shank or tool 8.

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3o the stop-nut 31.

i 35 Se iece 58 which ts ti 6o j g Extending from one end of the receiver 5 into the cut 12 is a centrally-drilled hole 20, as clearly seen in Fig. 1, in which a round camrod 21 is adapted to slide. This cam-rod 21 5 has a cam-surface 22, here shown wedgerormed, adjacent the cut 12, which is ada ted 'to -engage the lower corner 23 of cutteread 10. The opposite portion of cam-rod 21 for some distance from its extreme end is of re- 1o duced diameter and lhas a square shoulder 24. (Shown in section in Fig. 1.) Anexternally screw-threaded sleeve 25 is rotatably mounted on this portion of the cam-rod 21 and is held against displacement thereon by a retaining-screw 26. The screw-threaded portion of this sleeve 25 engages at 27 a tapped or screw-threaded section oi the holev 2() 1n receiver 5. A longi ,udinal slot 28 is JformedA in the cam-rod 21, and the point of a screw 29 2o in receiver 5 engagestherewith and prevents the cam-rod 21 Jfrom turning in the hole 20.

The extremity ofthe screw-threaded sleeve 25, that projects beyond the receiver 5, is

Jformed square, asishown at 30, Figs. 1 and la,

2 5 and an adjustable stop-nut 81 is rovided on sleeve 25 and is locked in any esired position on'said sleeve by the set-screws 32,

threading through" the l`an e 33, which is formed on said sleeve 25, an setting against VAs Jfrequent sharpening of the vcuttingpoint 11 is found necessary and a consequent 4Q which these separable'cutting-blocks 50 may be attached to the cutter-heads 10 of the toolfibar, as illustrated in Figs. 5, 6,' and 7 of the f drawings.

,',head 50 is provided with a transversely-dis- In Fig. 5 the separable cutterposed dovetail slide 51, which slides with a driving t in a corresponding dovetail slideway 52 in cutter-head 10. Fig. 6 shows a cut-down flat surface 53 in the cutter-head 10, on which are the v'centering-blocks 54, with 5o which a longitudinal groove`55 in cutter-head 50 engages. A screw may be passed down .through a counterbored screw-hole 56 in block 50 into the screw-tapped hole 57 in cutlter-head 10, serving to hold the parts se- 55 curely together.

Fig. 7 is a similar construction to that shown in Fig. 5; but in this case the cutting-block 50 is provided with a lon itudinally-arran ed de ending dovetail slidetly in a corresponding ovetail slideway 59 1n cutter-head 10.

Fig. 8 shows a speciic form of tool and cutj arbor-body and engaging in ter wherein the` angularly-extended cutter is A narrower than the head.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, `is

' 1. In an arbor, in combination, the arborbody constructed with an opening, for a tool, therein, and a longitudinal bore beyond the tool-receiving opening,

ward the tool-opening-a cam inclined to cooperate with the tool, and provided with the longitudinal groove 28, the sleeve, externally threaded and screwing into a correspondinglythreaded end portion of the arbor,.having an inner end-thrust bearing against-the cam-bar, and said sleeve being provided with the flange 33, and having in screw engagement thereon the nut, adjacent the flange, and one or more set-screws threading through the flange and against the nut, and the stud penetrating the the cam-bar groove.

`2. A tool-carrying arbor constructed with a mortise-like opening for a tool therein, having the recess for the head ortion wider than that for the tool-bar or siiank portion, and having, as a longitudinal continuation ofthe head-receiving recess, the narrower recess portion 12, combined with the tool comprising the shank-bar, the widened head 10 carryin the cutting-tool and the central longitudina ly-extending narrowed extension 13.

3. A tool-carrying arbor constructed with a mortise-like opening for a vtool therein, having the recess Jfor the head ortion wider than that for the tool-bar or shank portion, and having, as a longitudinal continuation of the head-receiving recess, the narrower recess portion 12=formed with the undercut and inclined end wall 12, combined with the tool comprising the shank-bar, the widened head 10 carrying the cutting-tool and the central longitudinally extending narrowed extension 13 formed with the end thereof inclined, as shown.

4. A tool-arbor constructed with the opening Jfor a tool therein,

tool-carrying ead, nected tool engaged with said-head, and a aearn-provided member adjustably movable j within the arbor,

against the head end portion of the too -bar and adapted to im inge a cutting-tool in said' opening, a rodv or bar having at its end toand a cutting-tool in said arbor com rising a shank-bar, a widened and a detachably-con-L 

